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Aiming at satisfying in a cost-effective manner the forecast traffic growth that future mobile networks will need to support, traditional distributed Radio Access Networks (RANs) are evolving towards centralized architectures. Specifically, the Cloud-RAN (C-RAN) architecture has shown that can alleviate to some extent the ever increasing Total Cost of Ownership in mobile networks. The current trend...
Wireless sensor networks (WSNs) serving in hostile environments are susceptible to multiple collocated failures due to explosives and natural calamities such as avalanches, landslides, etc., which can partition the network into disjoint segments. In such a scenario, federating the segments becomes essential for reestablishing communication among segments and resuming the WSN operation. Placing relays...
Mobile users run complex applications increasingly, requiring much more computing power and energy. Cloud-enhanced small cell networks, endowing small cells with cloud computing abilities, extend mobile devices capabilities and battery lifetime by providing them with the advantages of instant and high-rate access to the cloud servers. However, conventional offloading policy can not fully exploit these...
Distributed caching in the radio access network (RAN) has been a common approach for improving QoE per- ceived by mobile users and reducing backhaul traffic load. In this paper, we focus on the problem of cooperative and online searching and routing for content objects cached according to their local popularity in small- cell networks (SCNs), considering practical issues of implementation complexity...
Named Data networking(NDN) has emerged as a new communication paradigm designed for efficient dissemination of data. However, mobility issues are not considered sufficiently. Consumer or producer mobility can incur request staleness issue, the loss of Interest and Data packets and communication delay. Through analysis, we consider how to forward the buffered data from old access point(AP) to new one...
Wireless sensor networks (WSNs) are used to continuously monitor certain area of interest and send data back to the base station for processing. In many applications, WSNs serve in inhospitable environments where multiple node failure may take place causing the network to be divided into disjoint segments. Also, multiple standalone WSNs in some applications may need to be federated to collectively...
Wireless Sensor Networks (WSN) that operate unattended in harsh environments are susceptible to large scale damage, where many nodes fail simultaneously and the network gets partitioned into several disjoint segments. Restoring connectivity of structurally damaged WSN's segments may be urgent considering that they are employed to assist in risky missions. To deal with these scenarios, Mobile Data...
This paper investigates the performance of averaging based distributed consensus algorithms in topology varying networks with existing non-uniform transmission delays. A finite power of the delay augmented system matrix is shown to be scrambling which confirms that non-uniform bounded delay does not affect the ultimate convergence of the distributed iterative algorithms considered in this paper. The...
The increase in multimedia usage places stringent requirements on wireless network performance in terms of lesser handoff delays. A VOIP client, for example, cannot tolerate a delay larger than 150 ms between the incoming voice packets to ensure a satisfactory interactive service to the user. Of the 150ms, only 50ms is allowed for handoff and the rest should accommodate the transmission delay of the...
In this paper, we identify two distinct classes of routing algorithms for Delay or Disruption Tolerant Networks (DTN). The purpose of this classification is to clearly delineate the assumptions they work under and to facilitate mapping of applications to these algorithms. Algorithms based on opportunistic contact and some variant of epidemic routing use minimal topology knowledge and the most resources...
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